Specification	UCC3813D-4

Control Features	Frequency Control
Duty Cycle	49 %
Frequency - Switching	1 MHz
Internal Switch(s)	True
Mounting Type	Surface Mount
Operating Temperature [Max]	150 °C
Operating Temperature [Min]	-55 °C
Output Isolation	Non-Isolated
Package / Case	0.154 in
Package / Case	8-SOIC
Package / Case	3.9 mm
Supplier Device Package	8-SOIC
Topology	Forward, Buck, Boost, Flyback
Voltage - Start Up	12.5 V
Voltage - Supply (Vcc/Vdd) [Max]	12 V
Voltage - Supply (Vcc/Vdd) [Min]	8.3 V

UCC3813-4 Series

Economy low power BICMOS 1MHz current mode PWM with 12.5V/8.3V UVLO, 50% duty cycle, 0C to 70C

Part	Internal Switch(s)	Output Isolation	Voltage - Start Up	Mounting Type	Frequency - Switching	Package / Case	Package / Case	Package / Case	Operating Temperature [Max]	Operating Temperature [Min]	Control Features	Duty Cycle	Topology	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Supplier Device Package
Texas Instruments UCC3813D-4		Non-Isolated	12.5 V	Surface Mount	1 MHz	0.154 in	8-SOIC	3.9 mm	150 °C	-55 °C	Frequency Control	49 %	Boost Buck Flyback Forward	12 V	8.3 V	8-SOIC
Texas Instruments UCC3813D-4		Non-Isolated	12.5 V	Surface Mount	1 MHz	0.154 in	8-SOIC	3.9 mm	150 °C	-55 °C	Frequency Control	49 %	Boost Buck Flyback Forward	12 V	8.3 V	8-SOIC

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	N/A	333	$ 2.23
		333	$ 2.23
		353	$ 1.95
		353	$ 1.95
Texas Instruments	TUBE	1	$ 1.86
		100	$ 1.53
		250	$ 1.10
		1000	$ 0.83

Description

General part information

UCC3813-4 Series

The UCC3813-x device family of high-speed, low-power integrated circuits contains all of the control and drive components required for off-line and DC-to-DC fixed-frequency current-mode switching power supplies with minimal parts count.

These devices have the same pin configuration as the UC384x device family, and also offer the added features of internal full-cycle soft start and internal leading-edge blanking of the current-sense input.

The UCC3813-x device family offers a variety of package options, temperature-range options, choice of maximum duty cycle, and choice of critical voltage levels. Devices with lower reference voltage such as the UCC3813-3 and UCC3813-5 fit best into battery operated systems, while the higher reference and the higher UVLO hysteresis of the UCC3813-2 device and UCC3813-4 device make these ideal choices for use in off-line power supplies.